Valve



Oct. 24, 1939. J. F. KYEs ET AL 2,177,301

VALVE Filed Nov. 20, 19:56

Jomv F. KYEJ' HERBERT J HAJTEDT Fig.4

Patented Oct. 24, 1939 UNITED STATES PATENT OFFICE VALVE ApplicationNovember 20, 1936, Serial No. 111,900

2 Claims This invention relates to valves, and more particularly to avalve of the rotary plug type adapted to control the distribution ofpulverized fuel to a pair of combustion furnaces.

In supplying pulverized fuel by the well known direct-fired system, itis a common practice to utilize a separate pulverizer for each furnaceand to provide a separate and independent connection between eachpulverizer and its particular furnace. This arrangement makes itpossible to control the rate of combustion in each furnace independentlyby regulation of the feed of fuel to the corresponding pulverizer. Ifhowever a plant has two furnaces fired in this manner, and one of thefurnaces has to be shut down for repairs at the same time as thepulverizer associated with the other furnace, it will be apparent thatneither furnace can be maintained in operation.

It is accordingly the main object of the inven- 20 tion to overcome thisdifficulty and to provide a simple and convenient valve whereby eachpulverizer may be independently connected to its respective furnace, oreither of the pulverizers may be connected to the furnace normallycorrespond- 25 ing to the other pulverizer.

It is a further object of the invention to provide a comparativelysimple and inexpensive valve which will normally serve to direct thedischarge from the pulverizers to their respective furnaces 30independently but which can be readily adjusted to direct the dischargefrom either pulverizer to the furnace normally fired by the otherpulverizer.

With these and other objects in view, as will 35 be apparent to thoseskilled in the art, the invention resides in the combination of partsset forth in the specification and covered by the claims appendedhereto.

Referring to the drawing illustrating one em- 40 bodiment of theinvention, and in which like reference numerals indicate like parts,

Fig. 1 is a front elevation of a pair of furnaces and the associatedfuel feeding apparatus;

Fig. 2 is a longitudinal section through a valve, the section beingtaken on the line 22 of Fig. 3;

Fig. 3 is an end elevation of the valve; and

Fig. 4 is a fragmentary section taken on the line 4-4 of Fig. 2.

The embodiment illustrated comprises a steam boiler furnace l having aburner ll mounted on its front wall, and a second steam boiler furnace!2 having a burner I4 mounted on its front wall. 'flie two furnaces arelaterally adjacent, and in 55' front of them there is provided a pair offuel pulverizers l5 and I6 driven by electric motors l8 and I9respectively.

A casing 21 is mounted above the pulverizers, and this casing isprovided with a cylindrical bore 22. The casing walls are provided withtwo inlet ports 24 and 25, and two outlet ports 26 and 21, allcommunicating radially with the bore 22 and all located in a commonplane which passes through the axis of the bore. The inlet ports 24 and25 are located diametrically opposite the outlet ports 26 and 21respectively. Pipes 29 and 3!] connect the inlet ports 24 and 25 withthe pulverizers I5 and I6 respectively, and pipes 3| and 32 connect theoutlet ports 26 and 21 with the burners H and I4 respectively.

A cylindrical plug 34 fits closely within the bore 22 and is held inplace against axial movement by means of annular plates 35 secured tothe ends of the casing 2| and overlapping the ends of the plug. Ahexagonal boss 36 is formed on each end of the plug so that the plug maybe rotatably adjusted by means of a suitable wrench.

The plug 34 is provided with passages so arranged that each pulverizermay be connected with its respective furnace, or either pulverizer maybe connected with the opposite furnace, depending upon the position ofthe plug. For this purpose there is shown a central passage 38 extendingtransversely through the plug, and two passages 39 and 40 located onopposite sides of the passage 38 and likewise extending transverselythrough the plug. The central passage 38 is inclined with respect to theaxis of the plug, and its opposite ends are located in a common axialplane and they may be brought into register either with the ports 26 and25 (as shown in Fig. 2) or with the ports 24 and 21 (by rotating theplug 180 degrees from the position shown). One end of the passage 38 islocated in a plane extending through the ports 24 and 26 andperpendicular to the axis of the plug, and the other end of the passageis located in a plane extending through the ports 25 and 21 andperpendicular to the axis of the plug. The passage 39 is arranged withits ends diametrically opposite each other and located in the first ofsaid planes, and the passage 40 is arranged with its ends diametricallyopposite each other and located in the second of said planes. The endsof the passages 39 and 40 are located in a common plane extendingthrough the axis of the plug and at right angles with the axial planewhich contains the central passage 38. In order to make possible a morecompact construction, with a plug of comparatively small diameter, thepassages 39 and 40 are offset intermediate their ends in directionsperpendicular to the adjacent portions of the central passage 38.

The operation of the invention will now be apparent from the abovedisclosure. By rotating the plug 34 through degrees from the positionshown in Fig; 2,the ends of the passage 39 may be brought into registerwith theports 24 and 26, while the ends of the passage 40 are at thesame time brought into register with the ports 25 and p 21. In thismanner the pulverizers l5 and IE will be independently connected to thefurnaces l0 and I2 respectively, and the rate of combustion in theseparate furnaces can be controlled as desired. If now it becomesnecessary to shut down the furnace l2, and at the same time thepulverizer l5 requires repair or is otherwise inoperative, the plug 34can be turned tothe position shown in Fig. 2, and the pulverizer l6 canbe used to supply fuel through the passage 38 to the furnace l0.Similarly, by turning the plug through degrees from the position shownin Fig. 2, the pulverizer Hi can be used to supply fuel through thepassage 38 to the furnace l2. It will thus be seen that so long as oneof the furnaces is available for use, it may be kept in. operation byutilizing, if necessary or desirable, the pulverizer which normallysupplies fuel to the other furnace. The change-over can be made veryquickly and easily, since it merelyrequires the adjustment of a singlemember. The apparatus is comparatively simple and inexpensive tomanufacture and install.

Having thus described our invention, what we claim as new and desire tosecure by Letters lPatent is:

1. A valve comprising a casing having a bore with two portscommunicating with the bore at one side and two ports communicating withthe bore at the other side, all the ports being located in a commonplane which passes through the axis of the bore, and the ports on oneside being diametrically opposite the respective ports on the otherside, and a plug rotatably supported in the bore and provided with twotransverse passages having their ends located in a common plane whichpasses through the axis of the plug, each passage having a cross-sectionwhich is substantially uniform in size and shape throughout the lengthof the passage, the said passages being arranged to connect the ports atone side to the diametrically opposite ports when-the plug is in oneposition, the plug having a third transverse passage located in a planewhich passes through the axis of the plug and is substantiallyperpendicular to the last-mentioned plane, the third transverse passagebeing positioned between the first-mentioned passages and arranged toconnect one of said ports to a diagonally opposite port when the plug isrotated to a different position.

2. A valve comprising a casing having a bore with two portscommunicating with the bore at one side and two ports communicating withthe bore at the other side, all the ports being located in a commonplane which passes through the axis of the bore, and the ports on oneside being diametrically opposite the respective ports on the otherside, and a plug rotatably supported in the bore and provided with twotransverse passages having their ends located in a common plane whichpasses through the axis of the plug, the said passages being arranged toconnect the ports at oneside to the diametrically opposite ports whenthe plug is in one position, the plug having a third transverse passagepositioned between said passages and located in a plane which passesthrough the'axis of the plug and is substantially perpendicular to thelast-mentioned plane, the third transverse passage being arranged toconnect one of said ports to a diagonally opposite port when the plug isrotated to a difierent po sition, the intermediate portions of the twofirstmentioned passages being offset away from the adjacent portion ofthe said third passage.

JOHN F; KYES.

HERBERT J. HASTEDT.

